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Ruhr Universität Bochum
1.
Dörr, Mathias.
Star formation in RCW38.
Degree: 2012, Ruhr Universität Bochum
URL: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35683
► Untersuchung des Sternentstehungsgebietes RCW38 über 3 Monate in J,H und K mit dem IRIS-Teleskop der Universitätssternwarte Bochum in Chile. Gewinnung von 40 Datenpunkten, mittels derer…
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▼ Untersuchung des Sternentstehungsgebietes RCW38
über 3 Monate in J,H und K mit dem IRIS-Teleskop der
Universitätssternwarte Bochum in Chile. Gewinnung von 40
Datenpunkten, mittels derer 139 variable Sterne identifiziert
werden konnten und hinsichtlich ihres Variabilitätsverhaltens
untersucht wurden. Desweiteren konnten einige Objekte mit
signifikanten Helligkeitsausbrüchen beobachtet werden. Mittels
tiefer, coaddierter Gesamtbilder konnten diese Objekte durch
Farb-Helligkeitsanalyse hinsichtlich Extinktion, Einbettung in den
Cluster, K-Exzess und Masse untersucht werden. Es zeigt sich dass
diese Sterne in den Cluster eingebettet sind und eine typische
Massen- und Amplitudenverteilung zeigen wie sie z.B. In früheren
Studien des Orion- Nebels zu finden sind. Der Vergleich mit
früheren Studien im Röntgen- und Mittelinfrarotbereich bestätigt
die Hälfte der Identifikationen, während die andere Hälfte neue
Detektionen junger Sterne darstellt.
Advisors/Committee Members: Physik und Astronomie.
Subjects/Keywords: Astronomie; Stern; Infrarot; Variabilität;
Molekülwolke
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APA (6th Edition):
Dörr, M. (2012). Star formation in RCW38. (Thesis). Ruhr Universität Bochum. Retrieved from http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35683
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Dörr, Mathias. “Star formation in RCW38.” 2012. Thesis, Ruhr Universität Bochum. Accessed December 06, 2019.
http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35683.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Dörr, Mathias. “Star formation in RCW38.” 2012. Web. 06 Dec 2019.
Vancouver:
Dörr M. Star formation in RCW38. [Internet] [Thesis]. Ruhr Universität Bochum; 2012. [cited 2019 Dec 06].
Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35683.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Dörr M. Star formation in RCW38. [Thesis]. Ruhr Universität Bochum; 2012. Available from: http://nbn-resolving.de/urn/resolver.pl?urn=urn:nbn:de:hbz:294-35683
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

City University London
2.
Filippaki, Evangelia.
Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study.
Degree: PhD, 2015, City University London
URL: http://openaccess.city.ac.uk/13594/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681379
► Introduction. Glistenings are fluid-filled inclusions in the polymer matrix of an intraocular lens (IOL). Acting as refractile particles they may contribute to a reported high…
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▼ Introduction. Glistenings are fluid-filled inclusions in the polymer matrix of an intraocular lens (IOL). Acting as refractile particles they may contribute to a reported high level of forward light scatter. However, several studies have reported that there is no significant correlation with a number of measures of visual function. The purpose of the work reported in this thesis was to test if there was an association between in vitro forward light scatter and grade of glistenings. The in vitro approach allows measurement of forward light scatter without the confounding effects of other structures in the eye and subjective responses. Methods. Intraocular lenses were placed at the centre of rotation of a detector stage. The detector measured the forward scattered light in star space at 37 angles covering ±18 degrees. Measurements were made for each of the test lenses at 3mm, 4mm and 5mm pupil sizes. Forward light scatter was quantified by calculating the straylight (volume under the scatter function) for the large angle domain (> 1 deg.). Images of the intraocular lenses were captured with a digital Nikon FS-2 photo slit-lamp. Having developed a Glistenings Detection Programme (GDP) in collaboration with external computer scientists, images were analysed. Results of glistening detection, which included their number, size, density and distribution, were correlated with in vitro forward light scatter measurements. Results. A statistically significant correlation was found between forward light scatter and the number, size and density of glistenings. Comparing our scatter results with the CIE standards, suggests that only high glistenings severity could have an impact on visual function. In addition, results were inversely proportional to pupil size due to the non-uniform distribution of glistenings. The shape of glistenings was shown to be predominantly ellipsoidal rather than spherical. Size and number of glistenings varies in the hydrophobic acrylic materials. Despite the production of new glistenings-free materials, development of glistenings may still exist with cases of high severity giving straylight parameter values greater than those for a cortical cataract subject. A statistically significant difference in MTF and Resolution limit was found in IOLs, pre and post thermal treatment. Finally, a correlation between IOL dioptric power and severity of glistenings was found. Conclusion. Subjective methods for grading intraocular lens glistenings poorly describe the significance of increased light scattering. Image processing software can provide objective data on glistenings density, size and morphology, factors which are important in light scatter modelling. The impact of glistenings on visual function needs further clinical investigation.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Filippaki, E. (2015). Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study. (Doctoral Dissertation). City University London. Retrieved from http://openaccess.city.ac.uk/13594/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681379
Chicago Manual of Style (16th Edition):
Filippaki, Evangelia. “Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study.” 2015. Doctoral Dissertation, City University London. Accessed December 06, 2019.
http://openaccess.city.ac.uk/13594/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681379.
MLA Handbook (7th Edition):
Filippaki, Evangelia. “Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study.” 2015. Web. 06 Dec 2019.
Vancouver:
Filippaki E. Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study. [Internet] [Doctoral dissertation]. City University London; 2015. [cited 2019 Dec 06].
Available from: http://openaccess.city.ac.uk/13594/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681379.
Council of Science Editors:
Filippaki E. Glistenings in intraocular lenses and their effect on forward light scatter : an in vitro study. [Doctoral Dissertation]. City University London; 2015. Available from: http://openaccess.city.ac.uk/13594/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681379

City University London
3.
Koller, Anton W.
The friction coefficient of soft contact lens surfaces in relation to comfort and performance.
Degree: PhD, 2014, City University London
URL: http://openaccess.city.ac.uk/13791/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681366
► The soft contact lenses of today are made from a variety of hydrogel materials. These materials have different properties in terms of water content, monomers,…
(more)
▼ The soft contact lenses of today are made from a variety of hydrogel materials. These materials have different properties in terms of water content, monomers, hardness and other tensile characteristics. It is likely that the frictional properties also vary between materials. It is known that constituents of the tear film interact with contact lens materials to form a biofilm on the lens surface. The hypothesis of this research is that although the frictional properties of lens materials may vary these properties do not affect the comfort and performance of the lenses in vivo. A tribometer is a device to measure the coefficient of friction of materials. There was no commercially available tribometer designed specifically for use with contact lens materials, so one was constructed and validated against standard solid materials. The same equipment was used to determine the friction coefficients of five contemporary soft lens materials under different conditions of lubrication but, unlike other tribometers, this unique design simulated human blinking as far as possible. The experimental friction coefficients varied widely from 0.27 to 5.89 under different conditions of lubrication. The largest variation between materials was seen using the most viscous lubricant. For the in vivo studies the author coordinated the manufacture of 250 contact lenses, which were lathe cut and polished to a standard design, achieving exceptionally tight tolerances, using the same five materials. This rigourous process was carried out to minimise variations in the geometry of each contact lens. Subjects were screened to minimise ocular heterogeneities between subjects. Clinical performance of each lens was assessed using comfort, contrast sensitivity, visual acuity, entoptic phenomena, non-invasive tear break-up time and lens movement on the eye. In a clinical environment none of these parameters showed any associations with the coefficients of friction found in vitro, apart from a moderate correlation (rho = 0.5) between lens movement and the coefficient of friction under borderline friction conditions. In conclusion, the findings of this research support the hypothesis that frictional properties of soft lenses do not affect comfort and performance in vivo.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Koller, A. W. (2014). The friction coefficient of soft contact lens surfaces in relation to comfort and performance. (Doctoral Dissertation). City University London. Retrieved from http://openaccess.city.ac.uk/13791/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681366
Chicago Manual of Style (16th Edition):
Koller, Anton W. “The friction coefficient of soft contact lens surfaces in relation to comfort and performance.” 2014. Doctoral Dissertation, City University London. Accessed December 06, 2019.
http://openaccess.city.ac.uk/13791/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681366.
MLA Handbook (7th Edition):
Koller, Anton W. “The friction coefficient of soft contact lens surfaces in relation to comfort and performance.” 2014. Web. 06 Dec 2019.
Vancouver:
Koller AW. The friction coefficient of soft contact lens surfaces in relation to comfort and performance. [Internet] [Doctoral dissertation]. City University London; 2014. [cited 2019 Dec 06].
Available from: http://openaccess.city.ac.uk/13791/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681366.
Council of Science Editors:
Koller AW. The friction coefficient of soft contact lens surfaces in relation to comfort and performance. [Doctoral Dissertation]. City University London; 2014. Available from: http://openaccess.city.ac.uk/13791/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.681366

Cardiff University
4.
Hiscox, Rachel Joy.
The retina in cystic fibrosis.
Degree: PhD, 2013, Cardiff University
URL: http://orca.cf.ac.uk/59738/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610988
► Cystic fibrosis (CF) is caused by defective function of CF Transmembrane Conductance Regulator (CFTR), an epithelial ion channel that facilitates chloride secretion. Previous research has…
(more)
▼ Cystic fibrosis (CF) is caused by defective function of CF Transmembrane Conductance Regulator (CFTR), an epithelial ion channel that facilitates chloride secretion. Previous research has identified impaired dark adaptation (DA) in CF, which has been attributed to concomitant vitamin A deficiency or CF-related diabetes (CFRD). However, CFTR has been localised to the retinal pigment epithelium (RPE) and it is proposed that abnormal DA could be a primary manifestation of CF. DA is similarly impaired in individuals with type 1 and 2 diabetes and is thought to be caused by retinal hypoxia as oxygen inhalation ameliorates abnormal thresholds. The aim of this thesis was to investigate DA during oxygen inhalation in CF subjects with and without CFRD to gain further insight about the aetiology of this abnormal DA. The work also aimed to examine retinal structure using optical coherence tomography (OCT) to determine the consequences of CFTR dysfunction at the RPE. Final DA thresholds were not impaired in CF subjects as a whole during the inhalation of air. However, when grouped according to diabetic status, CFRD subjects showed a significantly elevated final rod threshold which was ameliorated following oxygen inhalation. This suggests that the retina is hypoxic in CFRD subjects and that impaired DA in CF is secondary to CFRD rather than a primary manifestation of CFTR malfunction at the RPE. Contrary to the proposed hypothesis, retinal and RPE/photoreceptor layer thickness was significantly thinner in CF subjects. These results suggest that impaired CFTR function at the RPE does not directly affect retinal structure. · In conclusion, this is the first study to determine that retinal structural and functional abnormalities are not caused directly by CFTR dysfunction but are a secondary manifestation of the disease. Further research is necessary to understand the impact of these findings.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hiscox, R. J. (2013). The retina in cystic fibrosis. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/59738/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610988
Chicago Manual of Style (16th Edition):
Hiscox, Rachel Joy. “The retina in cystic fibrosis.” 2013. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/59738/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610988.
MLA Handbook (7th Edition):
Hiscox, Rachel Joy. “The retina in cystic fibrosis.” 2013. Web. 06 Dec 2019.
Vancouver:
Hiscox RJ. The retina in cystic fibrosis. [Internet] [Doctoral dissertation]. Cardiff University; 2013. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/59738/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610988.
Council of Science Editors:
Hiscox RJ. The retina in cystic fibrosis. [Doctoral Dissertation]. Cardiff University; 2013. Available from: http://orca.cf.ac.uk/59738/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610988

City University London
5.
Ctori, I.
Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy.
Degree: PhD, 2016, City University London
URL: http://openaccess.city.ac.uk/14612/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685584
► Macular pigment (MP) at the centre of the retina is thought to serve a protective function shielding the photoreceptors from damaging effects of blue light.…
(more)
▼ Macular pigment (MP) at the centre of the retina is thought to serve a protective function shielding the photoreceptors from damaging effects of blue light. The amount of MP and its spatial density distribution across the macula i.e. its spatial profile varies among individuals. Lower levels of MP and certain MP spatial profile phenotypes are believed to be associated with increased risk of age-related macular degeneration (AMD). There is suggestion that MP spatial profiles differ between ethnicities, with non-exponential profiles occurring more frequently in non-whites. This may explain some of the ethnic variations seen in AMD prevalence. However, previous investigations have used several methodologies to measure MP. In addition, inconsistent MP spatial profile definitions have been used; thus comparing data between studies is difficult. Nevertheless, it has been hypothesised that variations in MP spatial distribution could be due to differences in foveal architecture, in particular at the foveal centre where MP levels peak. A study was designed to investigate the effect of ethnicity on MP spatial density distribution and its relation to foveal architecture. The influence of known risk factors for AMD was also considered. Young (18 to 39 years), healthy volunteers of white (n = 76), South Asian (n = 80) and black (n = 70) ethnic origin were recruited to take part. MP measurements were obtained using a method based on heterochromatic flicker photometry (HFP) and foveal morphology measurements were taken from optical coherence tomography (OCT) scans. The coefficients of repeatability of each of these were confirmed in a sub-study. A systematic objective MP spatial profile classification technique was implemented throughout. The feasibility of applying this to MP measurements obtained with different techniques such as HFP and fundus autofluorescence (FAF) was also explored in a sub-study. The results showed that measures of MP optical density (MPOD) over the central retinal area were statistically significantly increased in South Asian and black compared to white subjects, whereby ethnicity explained around 10% of the variation (P < 0.0005). Non-exponential MP spatial profiles (ring-like and central dip respectively) were significantly more prevalent in South Asian and black compared with white subjects (χ2 (4, n = 226) = 13.4, P = 0.009). Integrated MPOD up to 1.8º was significantly increased in ring-like and central dip compared to exponential profiles (P < 0.0005) irrespective of ethnicity. South Asian and black individuals presented thinner central retinas and wider foveas compared to white individuals (P < 0.0005). However, while accounting for these ethnic variations, foveal architecture provided no predictive values for the MP spatial profile phenotype.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ctori, I. (2016). Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy. (Doctoral Dissertation). City University London. Retrieved from http://openaccess.city.ac.uk/14612/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685584
Chicago Manual of Style (16th Edition):
Ctori, I. “Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy.” 2016. Doctoral Dissertation, City University London. Accessed December 06, 2019.
http://openaccess.city.ac.uk/14612/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685584.
MLA Handbook (7th Edition):
Ctori, I. “Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy.” 2016. Web. 06 Dec 2019.
Vancouver:
Ctori I. Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy. [Internet] [Doctoral dissertation]. City University London; 2016. [cited 2019 Dec 06].
Available from: http://openaccess.city.ac.uk/14612/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685584.
Council of Science Editors:
Ctori I. Ethnic differences in the spatial distribution of macular pigment and its association with foveal anatomy. [Doctoral Dissertation]. City University London; 2016. Available from: http://openaccess.city.ac.uk/14612/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.685584

City University London
6.
Dabasia, Priya.
A study of the role of advanced technologies in glaucoma case-finding.
Degree: PhD, 2014, City University London
URL: http://openaccess.city.ac.uk/12364/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659282
► In the UK, 11,000 new cases of open angle glaucoma (OAG) are diagnosed annually in people aged 40 to 70 years. However, two-thirds of UK…
(more)
▼ In the UK, 11,000 new cases of open angle glaucoma (OAG) are diagnosed annually in people aged 40 to 70 years. However, two-thirds of UK OAG cases may remain undiagnosed, highlighting the need for improved detection. UK optometrists generate more than 95% of referrals for suspected glaucoma and ocular hypertension. Case-detection of glaucoma may be improved by using screening tests with better diagnostic accuracy, but standardised protocols for advanced technologies used alone, or in combination, to detect glaucoma are lacking. Chapter 2 reports on two cross-sectional surveys of UK community optometrists, determining the equipment and information technology (IT) used in optometric practice, and exploring the rationale behind the uptake of ophthalmic equipment and IT. UK optometrists are increasingly investing in new ophthalmic equipment and IT, including the latest technology. Longitudinal comparisons with previous surveys revealed an increase in use of Optical coherence tomography (OCT), Goldmann/Perkins tonometry and pachymetry. Variations in responses reflected differences in General Ophthalmic Services provision across the UK and involvement in community enhanced services. There was general agreement that specialised equipment enhances clinical care and permits increased involvement in enhanced services, but initial costs and ongoing maintenance can be a financial burden. Chapter 3 summarises a prospective cross-sectional study investigating the diagnostic accuracy of four advanced technologies for detecting POAG, used alone and in combination, in a representative sample (N=505) of the UK primary care population aged ≥60 years, and compared to a reference standard ophthalmic examination. Structural imaging using the iVue SD-OCT provided better discrimination between POAG and non-POAG/non-OHT subjects than either visual function test (Frequency Doubling Technology or Moorfields Motion Displacement Threshold). The low specificity of visual function tests precludes their use in isolation, but their use together with objective evaluation of optic nerve head structure by SD-OCT should improve case-detection of glaucoma. Chapter 4 describes a case-control study (N=78) evaluating the diagnostic effectiveness of two slit-lamp based techniques (van Herick and Smith’s) and imaging-based systems (Pentacam and Visante OCT) when compared to the reference standard gonioscopic observation, to screen for individuals at-risk of angle closure glaucoma (ACG). Overall, the van Herick test and Visante OCT, used either alone or in combination, showed best discrimination between narrow and open angles. Recording of either the temporal or nasal van Herick grade would be sufficient for case-finding in at-risk individuals. Chapter 5 summarises preceding chapters and details recommendations for future research.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Dabasia, P. (2014). A study of the role of advanced technologies in glaucoma case-finding. (Doctoral Dissertation). City University London. Retrieved from http://openaccess.city.ac.uk/12364/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659282
Chicago Manual of Style (16th Edition):
Dabasia, Priya. “A study of the role of advanced technologies in glaucoma case-finding.” 2014. Doctoral Dissertation, City University London. Accessed December 06, 2019.
http://openaccess.city.ac.uk/12364/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659282.
MLA Handbook (7th Edition):
Dabasia, Priya. “A study of the role of advanced technologies in glaucoma case-finding.” 2014. Web. 06 Dec 2019.
Vancouver:
Dabasia P. A study of the role of advanced technologies in glaucoma case-finding. [Internet] [Doctoral dissertation]. City University London; 2014. [cited 2019 Dec 06].
Available from: http://openaccess.city.ac.uk/12364/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659282.
Council of Science Editors:
Dabasia P. A study of the role of advanced technologies in glaucoma case-finding. [Doctoral Dissertation]. City University London; 2014. Available from: http://openaccess.city.ac.uk/12364/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.659282

City University London
7.
Turola, Massimo.
Investigation of plenoptic imaging systems : a wave optics approach.
Degree: PhD, 2016, City University London
URL: http://openaccess.city.ac.uk/15183/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690989
► Conventional imaging devices only capture a part of the total information carried by the light. A new generation of imaging devices, plenoptic systems, use an…
(more)
▼ Conventional imaging devices only capture a part of the total information carried by the light. A new generation of imaging devices, plenoptic systems, use an array of micro lenses to codify the light coming from an object into a four dimensional function called the light field. The final image is then obtained after post processing computations on the light field. In this work plenoptic imaging devices are analysed using a wave optics approach. A platform to simulate light propagating under the Fresnel approximation in a generic optical system was developed in MATLAB. An optical system can be modelled as the composition of two basic operators: the free space propagation and the lens. The first one was implemented developing an original method derived from the angular spectrum of plane waves theory of propagation. The second was implemented using a phase mask. The code was developed to optimize the signal to noise ratio and the computational time. Two different configurations of plenoptic imaging systems were simulated. The first is the plenoptic 1.0 configuration. The general theory of plenoptic 1.0 and the post processing algorithms presented in the literature were verified using the simulation platform. The effects of diffraction were also evaluated and an original refocusing method is presented. For the second configuration, plenoptic 2.0, a full study of the optical resolution has been made and a detailed analysis of the effects of diffraction is presented. The results achieved with the simulations have been used to design a working prototype of a plenoptic microscope. This novel wave optics approach enables us to quantify for the first time in the literature the effects of diffraction on this class of devices. In plenoptic 1.0 diffraction is a source of noise due to the crosstalk between neighbouring lenslets. In plenoptic 2.0 systems the optical resolution is directly proportional to the magnification of the lenslet array. A small magnification leads to a high directional sampling but at the same time to a loss of optical resolution. The finite dimensions of the lenslets together with the wave nature of light produce a physical limit to the amount of information that can be achieved sampling the optical fields with those kind of devices.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Turola, M. (2016). Investigation of plenoptic imaging systems : a wave optics approach. (Doctoral Dissertation). City University London. Retrieved from http://openaccess.city.ac.uk/15183/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690989
Chicago Manual of Style (16th Edition):
Turola, Massimo. “Investigation of plenoptic imaging systems : a wave optics approach.” 2016. Doctoral Dissertation, City University London. Accessed December 06, 2019.
http://openaccess.city.ac.uk/15183/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690989.
MLA Handbook (7th Edition):
Turola, Massimo. “Investigation of plenoptic imaging systems : a wave optics approach.” 2016. Web. 06 Dec 2019.
Vancouver:
Turola M. Investigation of plenoptic imaging systems : a wave optics approach. [Internet] [Doctoral dissertation]. City University London; 2016. [cited 2019 Dec 06].
Available from: http://openaccess.city.ac.uk/15183/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690989.
Council of Science Editors:
Turola M. Investigation of plenoptic imaging systems : a wave optics approach. [Doctoral Dissertation]. City University London; 2016. Available from: http://openaccess.city.ac.uk/15183/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.690989

Cardiff University
8.
Garcia Sanchez, Yaiza.
Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia).
Degree: PhD, 2012, Cardiff University
URL: http://orca.cf.ac.uk/41966/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567444
► Retinal image quality for peripheral as well as central visual field locations has been investigated in humans and an animal model (Columba livia) with wide-…
(more)
▼ Retinal image quality for peripheral as well as central visual field locations has been investigated in humans and an animal model (Columba livia) with wide- angle, panoramic vision because of its laterally oriented eyes. The goal was to determine whether the retinal image is maintained at a higher quality away from the fovea in pigeons as compared to humans. In this thesis, the HSWFS (Hart- mann Shack Wavefront Sensor) has been implemented with the correspondent validation and application for measuring ocular aberrations in the human and avian eye.
Using a modified HSWFS, the refractive error and total amount of ocular aberra- tions were measured for 20 pigeons along the horizontal meridian and for another 8 pigeons in the vertical meridian at three positions along the horizontal meridian. The HOA( High order aberrations) of 10 humans were measured at peripheral locations (±35 ◦) in the upper visual field and along the horizontal meridian. The anaesthetized animal’s head position was controlled by a stereotaxic head holder capable of horizontal and vertical rotation. Measured eccentricities were(±60◦) from the fovea in the horizontal meridian and +35 ◦ and -25 ◦ along each of the three vertical meridians. In pigeons, the LOA (astigmatism) on the horizontal meridian increase slightly from the center towards the far periphery but are relatively constant for ±20◦ around the fovea, whereas defocus remains almost constant. Vertical meridian measurements are consistent with the previously reported myopia in the lower visual field. Compared with measurements in human subjects, the overall values of RMS are much lower in the pigeon at all corresponding eccentricities. Off-axis vision is generally dominated by defocus and astigmatism. In pigeons, however, defocus along the horizontal meridian does not change dramatically whereas, along the vertical meridian, the presence of a lower field myopia is confirmed. Astigmatism of the eye for increasing eccentricity (horizontally and vertically) is consistently lower then expected theoretically and when compared with humans. This demonstrates that the visual optics of the pigeon are more fully corrected for peripheral vision than in humans.
Subjects/Keywords: RE Ophthalmology
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APA (6th Edition):
Garcia Sanchez, Y. (2012). Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia). (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/41966/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567444
Chicago Manual of Style (16th Edition):
Garcia Sanchez, Yaiza. “Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia).” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/41966/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567444.
MLA Handbook (7th Edition):
Garcia Sanchez, Yaiza. “Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia).” 2012. Web. 06 Dec 2019.
Vancouver:
Garcia Sanchez Y. Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia). [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/41966/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567444.
Council of Science Editors:
Garcia Sanchez Y. Analysis of retinal image quality for peripheral vision in humans and pigeons (Columba livia). [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/41966/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567444

Cardiff University
9.
Mohamad Shahimin, Mizhanim.
Development and validation of a digital quantitative orthoptics workstation.
Degree: PhD, 2012, Cardiff University
URL: http://orca.cf.ac.uk/31283/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567310
► The objective of the research is to provide the clinician with a simple system for making quantitative measurements that is comparable to the services of…
(more)
▼ The objective of the research is to provide the clinician with a simple system for making quantitative measurements that is comparable to the services of a skilled orthoptist. As many optometrists do not possess the necessary equipment for making such assessments, this technology would significantly enhance their referral capabilities. Reviews of the tests involved and instruments available are detailed in Chapter II and III. Chapter IV presents the various validation experiments carried out on the Tobii X120 eye tracker, concentrating on technical specifications such as, linearity range, optimum measurement distance and setup (with and without chin rest). We also investigated the effect of wearing different types of lens materials and pupil size measurements on the eye tracker system. We established the inter-examiner agreement of cover test measurements on groups of non-strabismic and strabismic subjects. This study, as detailed in Chapter V, involved collaboration with two clinical orthoptists. We found a good inter-examiner agreement for both the non-strabismic and strabismic cover tests. We further investigated the use of the eye tracker in providing more reliable findings for cover test measurements as compared to the conventional cover test (Chapter VI). Finally we extended the investigation to a number of different clinical subjects attending the Bristol Eye Hospital (Chapter VII) in order to evaluate our purpose-developed monocular calibration routine. Performing quantitative eye movement analysis will provide valuable additional information in any clinical investigation of patients with ophthalmological and/or neurological disorders, leading to greater precision in diagnosis. Traditional methods for the evaluation of oculomotor disorders rely on the diagnostic and therapeutic judgements by the examining clinicians and subjective responses from the patient. However, the use of currently available eye movement recording system will provide valuable alternatives for obtaining more objective and quantitative measurements.
Subjects/Keywords: RE Ophthalmology
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APA (6th Edition):
Mohamad Shahimin, M. (2012). Development and validation of a digital quantitative orthoptics workstation. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/31283/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567310
Chicago Manual of Style (16th Edition):
Mohamad Shahimin, Mizhanim. “Development and validation of a digital quantitative orthoptics workstation.” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/31283/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567310.
MLA Handbook (7th Edition):
Mohamad Shahimin, Mizhanim. “Development and validation of a digital quantitative orthoptics workstation.” 2012. Web. 06 Dec 2019.
Vancouver:
Mohamad Shahimin M. Development and validation of a digital quantitative orthoptics workstation. [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/31283/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567310.
Council of Science Editors:
Mohamad Shahimin M. Development and validation of a digital quantitative orthoptics workstation. [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/31283/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567310

Cardiff University
10.
Dillingham, Christopher Mark.
An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina.
Degree: 2012, Cardiff University
URL: http://orca.cf.ac.uk/41964/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567443
► The centrifugal visual system (CVS) is a feedback pathway of predominantly visual information from the brain to both eyes, but principally to the contralateral retina.…
(more)
▼ The centrifugal visual system (CVS) is a feedback pathway of predominantly visual information from the brain to both eyes, but principally to the contralateral retina. The CVS is often considered to be something of a peculiarity, regarded as being specific to birds (Aves). Indeed, so-called ‘higher’ vertebrate species are assumed not to even possess such a centrifugal pathway when, in fact, an efferent projection to the retina has been conclusively demonstrated in all vertebrate groups (including humans). Perhaps this point of view reflects the lack of progress made in the elucidation of function in the bird, the dominant model for CVS research in the 120 years since being first described. In the series of experiments presented here, I have begun to investigate the role of the CVS in the modulation of eye growth. In addition, I have addressed a number of unknowns that exist regarding the midbrain connectivity of the CVS. In a series of four parallel lesion experiments, the centrifugal efferent pathway to the retina was unilaterally disrupted in post hatch chicks, raised under different developmental conditions. Under normal visual conditions but in the absence of centrifugal efferents, eyes contralateral to the lesion developed shorter eyes and moderate, relative hyperopia (long-sightedness). In contrast, under constant light conditions, ipsilateral eyes became significantly shorter than fellow (i.e. contralateral) eyes. Compensation for, and recovery from, plus and minus lens-imposed defocus in contralateral eyes was largely unaffected. Centrifugal efferents emanate from two distinct midbrain populations: the isthmo-optic nucleus (ION) and the surrounding scattered cells within the ectopic area (EA). From experiments using pathway tracing techniques, I have demonstrated that, unlike cells of the ION, EA cells do not receive input from primary visual areas. In addition I present evidence for a possible ‘cross-talk’ pathway between centrifugal cells on either side of the midbrain, and discuss its potential involvement in the normally symmetrical eye growth.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Dillingham, C. M. (2012). An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/41964/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567443
Chicago Manual of Style (16th Edition):
Dillingham, Christopher Mark. “An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina.” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/41964/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567443.
MLA Handbook (7th Edition):
Dillingham, Christopher Mark. “An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina.” 2012. Web. 06 Dec 2019.
Vancouver:
Dillingham CM. An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina. [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/41964/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567443.
Council of Science Editors:
Dillingham CM. An anatomical and functional characterisation of the avian centrifugal visual system : a feedback pathway from the brain to the retina. [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/41964/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567443

Cardiff University
11.
Gaffney, Allannah J.
Characterising adaptational dysfunction in age-related macular degeneration.
Degree: 2012, Cardiff University
URL: http://orca.cf.ac.uk/41072/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567427
► Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world. The prevalence of this disease will continue to increase over…
(more)
▼ Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world. The prevalence of this disease will continue to increase over the coming decades as the average age of the global population rises. There is consequently an urgent need to develop tests that are sensitive to early visual dysfunction, in order to identify individuals that have a high risk of developing AMD, to identify patients that would benefit from treatment, to assess the outcomes of that treatment and to evaluate emerging treatment strategies. An emerging body of evidence suggests that dark adaptation is a sensitive biomarker for early AMD. Cone dark adaptation is of particular interest to clinicians, as it can identify patients with early AMD in a relatively short recording period. Consequently, this thesis aimed to optimise psychophysical and electrophysiological techniques for the assessment of cone dark adaptation in early AMD, in order to maximise its diagnostic potential. A range of psychophysical methods were shown to be capable of monitoring the rapid changes in threshold that occur during cone dark adaptation. An optimal psychophysical protocol for the assessment of cone dark adaptation in early AMD was developed based on the results of a systematic evaluation of the effect of stimulus parameters and pre-adapting light intensity on the diagnostic potential of cone dark adaptation in early AMD. When compared to the focal cone ERG photostress test, both techniques were shown to be similarly diagnostic for early AMD. In addition, the time constant of cone recovery was shown to be significantly correlated with age, hence the sensitivity and specificity of cone dark adaptation as a biomarker for early macular disease may be further improved by considering these age-related changes. In conclusion, this thesis has confirmed that cone dark adaptation is a sensitive functional biomarker for early AMD. However, as cross-sectional studies are unable to determine the true diagnostic potential of a biomarker, longitudinal investigations are needed to explore the long-term potential of cone dark adaptation and other visual functions as biomarkers for early AMD.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gaffney, A. J. (2012). Characterising adaptational dysfunction in age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/41072/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567427
Chicago Manual of Style (16th Edition):
Gaffney, Allannah J. “Characterising adaptational dysfunction in age-related macular degeneration.” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/41072/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567427.
MLA Handbook (7th Edition):
Gaffney, Allannah J. “Characterising adaptational dysfunction in age-related macular degeneration.” 2012. Web. 06 Dec 2019.
Vancouver:
Gaffney AJ. Characterising adaptational dysfunction in age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/41072/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567427.
Council of Science Editors:
Gaffney AJ. Characterising adaptational dysfunction in age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/41072/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567427

Cardiff University
12.
Mishor, Gabriel.
Higher order aberrations and age-related cataract : a pre- and post- operative study.
Degree: 2012, Cardiff University
URL: http://orca.cf.ac.uk/39687/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567412
► The outcome of higher order aberrations (HOAs) prior to, and following, age-related cataract extraction and intra-ocular lens (IOL) implantation was explored using placido disc skiaoscopy…
(more)
▼ The outcome of higher order aberrations (HOAs) prior to, and following, age-related cataract extraction and intra-ocular lens (IOL) implantation was explored using placido disc skiaoscopy aberrometry. Ninety-nine individuals (median age 73.0, IQR 67.0, 80.5) underwent comprehensive ophthalmic examination including contrast sensitivity, endothelial cell imaging and aberrometry (Nidek OPD ARK-10000) at approximately 4 weeks pre-operatively (median 3.9, IQR 2.9, 4.8) 10 weeks (median 7.1, IQR 5.64, 11.71) (67 individuals) and 80 weeks (median 85.1, IQR 80.0, 89.6) (41 individuals) post-operatively. Linear relationships between thirteen demographical, functional and structural variables and each of three components, Total (TC), Corneal (CC) and Internal (IC), for each of eight HOAs, were separately explored, using Analysis of Variance, for each examination and for the pre- and post-operative differences, respectively. The TC and IC of all HOAs decreased post-operatively (p≤68%). Preoperatively, the TC and IC of the Total HOA decreased as the spherical equivalent (SE) became less negative (both p<0.001, R2=0.56 and 0.53). Both components of the Total HOA also decreased as the difference in SE between baseline and each follow-up became less negative (all p≤0.008, R2=0.45-0.61); the magnitude of the reduction varied between IOL type (p≤0.008). The IC of the Tilt, T.Sph and HiAstig HOAs increased with increase in severity of posterior subcapsular (p=0.018), of cortical (p=0.013) and of combined nuclear colour and cortical cataract (p=0.003), respectively. The relationship between cataract type and severity and reduction in post-operative HOA was not statistically significant at either follow-up examination. Slight associations, presumably due to post-operative corneal oedema, were present between increase in CCs of five HOAs and decreasing endothelial cell density at the first follow-up, only, (all p≤0.030, R2=0.09-0.14). Pre-operative TCs and ICs were larger, respectively, than those of 22 individuals with ‘less severe’ cataract and post-operatively than those of 49 individuals with clear media, obtained from retrospective data.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mishor, G. (2012). Higher order aberrations and age-related cataract : a pre- and post- operative study. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/39687/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567412
Chicago Manual of Style (16th Edition):
Mishor, Gabriel. “Higher order aberrations and age-related cataract : a pre- and post- operative study.” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/39687/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567412.
MLA Handbook (7th Edition):
Mishor, Gabriel. “Higher order aberrations and age-related cataract : a pre- and post- operative study.” 2012. Web. 06 Dec 2019.
Vancouver:
Mishor G. Higher order aberrations and age-related cataract : a pre- and post- operative study. [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/39687/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567412.
Council of Science Editors:
Mishor G. Higher order aberrations and age-related cataract : a pre- and post- operative study. [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/39687/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567412

Cardiff University
13.
Luraas, Knut.
Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis.
Degree: 2012, Cardiff University
URL: http://orca.cf.ac.uk/39684/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567411
► The thesis evaluated, in three studies, the clinical potential of Critical Flicker Fusion perimetry (CFFP) undertaken using the Octopus 311 perimeter. The influence of the…
(more)
▼ The thesis evaluated, in three studies, the clinical potential of Critical Flicker Fusion perimetry (CFFP) undertaken using the Octopus 311 perimeter. The influence of the learning effect on the outcome of CFFP was evaluated, in each eye at each of five visits each separated by one week, for 28 normal individuals naïve to perimetry, 10 individuals with ocular hypertension (OHT) and 11 with open angle glaucoma (OAG) all of whom were experienced in Standard Automated perimetry (SAP). An improvement occurred in the height, rather than in the shape, of the visual field and was largest for those with OAG. The normal individuals reached optimum performance at the third visit and those with OHT or with OAG at the fourth or fifth visits. The influence of ocular media opacity was investigated in 22 individuals with age-related cataract who were naïve to both SAP and CFFP. All individuals underwent both CFFP and SAP in each eye at each of four visits each separated by one week. At the third and fourth visit, glare disability (GD) was measured with 100% and 10% contrast EDTRS LogMAR visual acuity charts in the presence, and absence, of three levels of glare using the Brightness Acuity Tester. The visual field for CFF improved in height, only. Little correlation was present between the various measures of GD and the visual field, largely due to the narrow range of cataract severity. The influence of optical defocus for both CFFP and SAP was investigated, in one designated eye at each of two visits, in 16 normal individuals all of whom had taken part in the first study. Sensitivity for SAP declined with increase in defocus whilst that for CFFP increased. The latter was attributed to the influence of the Granit-Harper Law arising from the increased size of the defocused stimulus.
Subjects/Keywords: RE Ophthalmology
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APA ·
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MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Luraas, K. (2012). Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/39684/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567411
Chicago Manual of Style (16th Edition):
Luraas, Knut. “Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis.” 2012. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/39684/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567411.
MLA Handbook (7th Edition):
Luraas, Knut. “Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis.” 2012. Web. 06 Dec 2019.
Vancouver:
Luraas K. Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis. [Internet] [Doctoral dissertation]. Cardiff University; 2012. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/39684/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567411.
Council of Science Editors:
Luraas K. Clinical aspects of Critical Flicker Fusion perimetry : an in-depth analysis. [Doctoral Dissertation]. Cardiff University; 2012. Available from: http://orca.cf.ac.uk/39684/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.567411

Cardiff University
14.
Robinson, David.
Low-level night-time light therapy for age-related macular degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/108368/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732286
► Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world (Wong et al., 2014). The exact causes of AMD are…
(more)
▼ Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world (Wong et al., 2014). The exact causes of AMD are unclear but hypoxia has been implicated (Stefánsson et al., 2011). If hypoxia has a role in the pathogenesis of AMD treatments that mitigate the effect of retinal hypoxia may slow disease progression. This thesis aimed to establish the impact of light therapy, as delivered using a light emitting mask, on the progression of AMD. A phase I/IIa randomised controlled trial was implemented in which 60 participants with early and intermediate AMD were allocated to the intervention or the untreated control group in a 1:1 ratio and monitored over 12 months. The ability of secondary outcome measures (including: rate of cone dark adaptation, 14Hz flicker threshold and chromatic thresholds) to identify the likely risk of progression from early and intermediate AMD to advanced AMD was also assessed in a cross-sectional study evaluating the relationship between each baseline outcome measure and the severity of fundus changes. Sixty participants were recruited of which 47 (20 intervention, 27 control) completed the 12 month follow-up period. No significant difference was found in the change of any parameter between groups apart from the time constant of cone-photoreceptor recovery (cone τ), which was increased to a greater extent in the treated group. An additional 40 participants were recruited to the cross-sectional study (n=100). Measurement of cone τ was identified as the best independent predictor of increased AMD severity based on the AREDS Simplified Severity Scale (Ferris et al., 2005). Although a greater proportion of controls (48%) than mask wearers (38%) showed disease progression over the duration of the trial this difference did not reach statistical significance.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Robinson, D. (2017). Low-level night-time light therapy for age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/108368/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732286
Chicago Manual of Style (16th Edition):
Robinson, David. “Low-level night-time light therapy for age-related macular degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/108368/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732286.
MLA Handbook (7th Edition):
Robinson, David. “Low-level night-time light therapy for age-related macular degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Robinson D. Low-level night-time light therapy for age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/108368/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732286.
Council of Science Editors:
Robinson D. Low-level night-time light therapy for age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/108368/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732286

Cardiff University
15.
Terry, Louise.
An in vivo investigation of choroidal vasculature in age-related macular degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/107459/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732243
► Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world. Whilst the pathogenesis is complex and not fully understood, changes…
(more)
▼ Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world. Whilst the pathogenesis is complex and not fully understood, changes to the choroidal vasculature in AMD have been demonstrated using histology. Advances in imaging technology, particularly long-wavelength optical coherence tomography (OCT), allow in vivo visualisation and investigation of this structure. The aim of this work is to determine whether changes to the choroidal vasculature are detectable in AMD using in vivo imaging. This was achieved through the evaluation of parameters for quantifying the structure, and the application of a machine learning approach to automated disease severity classification, based on choroidal appearance. Participants with early AMD (n=25), neovascular AMD (nAMD; n=25), and healthy controls (n=25) underwent imaging with a non-commercial long-wavelength (λc=1040 nm) OCT device. Subfoveal choroidal thickness, choroidal area, and luminal area were significantly lower in the nAMD group than the healthy and early AMD groups, whilst vessel ratio was significantly greater (P < 0.05 in all cases). There was no significant difference in visible vessel diameter, choroidal vascularity index, luminal area ratio, or luminal perimeter ratio between the groups. No significant differences were found between the healthy and early AMD groups for any of the eight vascular parameters assessed. Classification of the disease groups based on choroidal OCT images was demonstrated using machine learning techniques. Textural features within the images were extracted using Gabor filters, and K-nearest neighbour, support vector machine, and random forest classifiers were assessed for this classification task. Textural changes were most pronounced in late-stage disease, although attribution to pathology or pharmacological intervention (anti-VEGF treatment) was not possible. Changes were also discernible in the early AMD group, suggesting sensitivity of this approach to detecting vascular involvement in early disease. In conclusion, structural changes to the choroidal vasculature in AMD are detectable in vivo using OCT imaging, demonstrated with both manual and automated analysis techniques. Whilst changes were most prominent in late-stage disease, subtle structural changes in early AMD were identified with texture analysis, warranting further investigation to improve our understanding of choroidal involvement in the pathogenesis of early AMD.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Terry, L. (2017). An in vivo investigation of choroidal vasculature in age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/107459/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732243
Chicago Manual of Style (16th Edition):
Terry, Louise. “An in vivo investigation of choroidal vasculature in age-related macular degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/107459/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732243.
MLA Handbook (7th Edition):
Terry, Louise. “An in vivo investigation of choroidal vasculature in age-related macular degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Terry L. An in vivo investigation of choroidal vasculature in age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/107459/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732243.
Council of Science Editors:
Terry L. An in vivo investigation of choroidal vasculature in age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/107459/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732243

Cardiff University
16.
Van Tilborg, Maria.
The role of primary healthcare in the management of work-related DED in the Netherlands.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/107038/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732229
► Dry eye disease (DED), and especially work-related dry eye, has an increasing incidence, and is expected to become a significant public health problem, with the…
(more)
▼ Dry eye disease (DED), and especially work-related dry eye, has an increasing incidence, and is expected to become a significant public health problem, with the increasing age until retirement, and the effect of the modern, digital, working environment causing higher visual demands. The indoor environment and more demanding, eye-related tasks, are risks factors for the development of dry eye symptoms, leading to DED at these workplaces. The current management for diagnosed DED is strongly pharmaceutical-based, and research looking at solutions towards better functioning and well-being of DED patients is rare. There is also a lack of evidence about the role of healthcare professionals in DED management. A substantial proportion of office workers surveyed experienced mild/moderate dry eye symptoms, and that while these were experienced more at work than at home, they had a negative impact on daily activities at work and after work, interfering with their social life. There is a lack of in-depth knowledge in dry eye diagnosis and management in all primary healthcare professionals surveyed and education is needed in management of work-related dry eye; there is a need for a specialised DED optometrist, with a recognised qualification; inter-professional cooperation should be promoted through better communication pathways; OHPs and optometrists should work together at the association level to develop clinical care guidelines; and a chronic care pathway in DED should be developed as part of the Dutch Government healthcare reforms.
Subjects/Keywords: RE Ophthalmology
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MLA ·
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APA (6th Edition):
Van Tilborg, M. (2017). The role of primary healthcare in the management of work-related DED in the Netherlands. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/107038/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732229
Chicago Manual of Style (16th Edition):
Van Tilborg, Maria. “The role of primary healthcare in the management of work-related DED in the Netherlands.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/107038/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732229.
MLA Handbook (7th Edition):
Van Tilborg, Maria. “The role of primary healthcare in the management of work-related DED in the Netherlands.” 2017. Web. 06 Dec 2019.
Vancouver:
Van Tilborg M. The role of primary healthcare in the management of work-related DED in the Netherlands. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/107038/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732229.
Council of Science Editors:
Van Tilborg M. The role of primary healthcare in the management of work-related DED in the Netherlands. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/107038/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732229

Cardiff University
17.
Chandrinos, Aristeidis.
Aspects of a perimetric learning index.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/107979/
;
http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732271
► The purpose of this thesis was to develop further the Learning Index in perimetry and examine how it performs in different groups, with different algorithms…
(more)
▼ The purpose of this thesis was to develop further the Learning Index in perimetry and examine how it performs in different groups, with different algorithms and investigate different procedures of calculation. The Learning Index calculated using concentric rings of visual field data, following the method of Olsson and colleagues (1997), facilitated in a MatLab environment. The used data included visual field assessment for 29 normal, 25 glaucoma and 25 ocular hypertensive individuals who followed perimetry for both eyes, for different strategies and for five consecutive visits once a week. Alternative methods to evaluate the LI were used like the glaucoma hemifield test pattern. The influence of the different strengths of a variety of filters was also used, filtering the perimeter outcome in order to disassociate learning effect from real defects. Mean and Median filters were also used, and dissimilar Adaptive filters as well, that seemed to be robust filters that could help to establish a more sensitive Learning Index. In automated perimetry the innovation of a Learning Index would consider and examine how individuals learn to perform better visual field tests during recurrent visits under different algorithms. The argument is if that Learning Index could allow clinicians performing visual field tests to administer their patients and control possible detected abnormality, after their first or second visual field test. In this way they will prevent development of the disease, confine patient’s fatigue and provide quality of life and simultaneously financial savings for the state and private health organizations. The carried out learning index calculations results were sufficiently encouraging for a next phase of a future index development and with likelihood in the future to be incorporated in automated perimeters algorithms.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Chandrinos, A. (2017). Aspects of a perimetric learning index. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/107979/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732271
Chicago Manual of Style (16th Edition):
Chandrinos, Aristeidis. “Aspects of a perimetric learning index.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/107979/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732271.
MLA Handbook (7th Edition):
Chandrinos, Aristeidis. “Aspects of a perimetric learning index.” 2017. Web. 06 Dec 2019.
Vancouver:
Chandrinos A. Aspects of a perimetric learning index. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/107979/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732271.
Council of Science Editors:
Chandrinos A. Aspects of a perimetric learning index. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/107979/ ; http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.732271

Cardiff University
18.
Robinson, David Grant.
Low-level night-time light therapy for age-related macular degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/108368/
► Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world (Wong et al., 2014). The exact causes of AMD are…
(more)
▼ Age-related macular degeneration (AMD) is the leading cause of visual impairment in the developed world (Wong et al., 2014). The exact causes of AMD are unclear but hypoxia has been implicated (Stefánsson et al., 2011). If hypoxia has a role in the pathogenesis of AMD treatments that mitigate the effect of retinal hypoxia may slow disease progression.
This thesis aimed to establish the impact of light therapy, as delivered using a light emitting mask, on the progression of AMD. A phase I/IIa randomised controlled trial was implemented in which 60 participants with early and intermediate AMD were allocated to the intervention or the untreated control group in a 1:1 ratio and monitored over 12 months. The ability of secondary outcome measures (including: rate of cone dark adaptation, 14Hz flicker threshold and chromatic thresholds) to identify the likely risk of progression from early and intermediate AMD to advanced AMD was also assessed in a cross-sectional study evaluating the relationship between each baseline outcome measure and the severity of fundus changes.
Sixty participants were recruited of which 47 (20 intervention, 27 control) completed the 12 month follow-up period. No significant difference was found in the change of any parameter between groups apart from the time constant of cone-photoreceptor recovery (cone τ), which was increased to a greater extent in the treated group. An additional 40 participants were recruited to the cross-sectional study (n=100). Measurement of cone τ was identified as the best independent predictor of increased AMD severity based on the AREDS Simplified Severity Scale (Ferris et al., 2005).
Although a greater proportion of controls (48%) than mask wearers (38%) showed disease progression over the duration of the trial this difference did not reach statistical significance.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Robinson, D. G. (2017). Low-level night-time light therapy for age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/108368/
Chicago Manual of Style (16th Edition):
Robinson, David Grant. “Low-level night-time light therapy for age-related macular degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/108368/.
MLA Handbook (7th Edition):
Robinson, David Grant. “Low-level night-time light therapy for age-related macular degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Robinson DG. Low-level night-time light therapy for age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/108368/.
Council of Science Editors:
Robinson DG. Low-level night-time light therapy for age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/108368/

Cardiff University
19.
Cassels, Nicola.
Quality-of-life and clinical outcomes in age-related macular degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/109189/
► Age-related macular degeneration (AMD) is of increasing concern given the ageing population, and the associated economic and social burdens. Vision-related quality-of-life (QoL) is arguably one…
(more)
▼ Age-related macular degeneration (AMD) is of increasing concern given the ageing population, and the associated economic and social burdens. Vision-related quality-of-life (QoL) is arguably one of the most important factors in the management of those with AMD. Consequently, there is a clear need for an understanding of the clinical outcomes that influence vision-related QoL in order to inform management strategies. The principle aim of the studies described herein was to determine the factors that predict vision-related QoL in those with AMD, over 1 year.
Experimental procedures were undertaken at baseline (n=52 individuals with AMD) and repeated after 1 year (n=32 individuals with AMD). These included: visual acuity, contrast sensitivity, reading speed, microperimetry, optical coherence tomography and fundus photography. A questionnaire interview included assessment of vision-related QoL (Impact of Visual Impairment questionnaire), health status (EQ-5D), level of depressive symptoms (PHQ-9) and well-being (Warwick-Edinburgh Well-Being Scale).
At baseline, the optimum multiple regression model accounted for 41% of the variance in vision-related QoL and included Mean Total Deviation or Mean Sensitivity with level of depressive symptoms. After 1 year, the optimum model to predict change in vision-related QoL accounted for 43% of the variance and included baseline contrast sensitivity and change in health status and reading speed.
The most clinically useful measures of visual function, in identifying those with a reduced QoL or those at risk of a reduced QoL were contrast sensitivity, microperimetry, and reading speed. These outcomes may allow a better understanding of vision-related QoL if they were adopted in a clinical setting. In conclusion, the studies provide sufficient evidence to encourage a review of the clinical outcome measures most relevant to vision-related QoL.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Cassels, N. (2017). Quality-of-life and clinical outcomes in age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/109189/
Chicago Manual of Style (16th Edition):
Cassels, Nicola. “Quality-of-life and clinical outcomes in age-related macular degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/109189/.
MLA Handbook (7th Edition):
Cassels, Nicola. “Quality-of-life and clinical outcomes in age-related macular degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Cassels N. Quality-of-life and clinical outcomes in age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/109189/.
Council of Science Editors:
Cassels N. Quality-of-life and clinical outcomes in age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/109189/

Cardiff University
20.
Beirne, Kathy.
Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/109384/
► Mutations in OPA1 are the leading cause of autosomal dominant optic atrophy, a disease in which a progressive loss of retinal ganglion cells (RGCs) leads…
(more)
▼ Mutations in OPA1 are the leading cause of autosomal dominant optic atrophy, a disease in which a progressive loss of retinal ganglion cells (RGCs) leads to blindness. In the B6;C3-Opa1Q285STOP (het) mouse, an Opa1 mutation causes a decrease in ATP production and a progressive loss in visual acuity, which coincides with pruning of the predominantly ON-centre RGC dendrites. As 670 nm light can increase ATP production and provide neuroprotective effects, we hypothesise that protection from dendritic pruning will be observed in the ON-centre RGCs of the het mouse with 670 nm light.
By Sholl analysis, and other measures of dendritic complexity, we found that ex vivo delivery of 670 nm light to retinal explants provides partial protection against the ex vivo retinal ganglion cell dendropathy, triggered by axotomy, in young wild-type mice. By the same methods of analyses, in vivo delivery of 670 nm light to aged wild-type and het mice partial provided protection against ex vivo RGC dendropathy in RGCs from wild-type mice and partial protection in RGCs from het mice.
By immunohistochemistry, the transcription factor NFκB was found to be activated in RGCs from aged het mice treated with in vivo 670 nm light. The oxidative stress sensor, DJ1, was upregulated in RGCs from aged wild-type and het mice, by in vivo 670 nm light. The activation of the serine/threonine protein kinase, AKT, which plays a pivotal role in controlling cell survival and apoptosis, was decreased following in vivo 670 nm light treatment in aged wild-type RGCs.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beirne, K. (2017). Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/109384/
Chicago Manual of Style (16th Edition):
Beirne, Kathy. “Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/109384/.
MLA Handbook (7th Edition):
Beirne, Kathy. “Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Beirne K. Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/109384/.
Council of Science Editors:
Beirne K. Exploring the potential of red light therapy as a treatment for retinal ganglion cell degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/109384/

University of Birmingham
21.
Denniston, Alastair K O.
Regulation of Dendritic cell function by the ocular microenvironment.
Degree: d_ph, College of Medical & Dental Sciences, 2010, University of Birmingham
URL: http://etheses.bham.ac.uk//id/eprint/932/
► The ocular microenvironment is immunosuppressive in animal models of antigen presenting cell function. My hypothesis was that in humans the normal ocular microenvironment maintains an…
(more)
▼ The ocular microenvironment is immunosuppressive in animal models of antigen presenting cell function. My hypothesis was that in humans the normal ocular microenvironment maintains an immature dendritic cell (DC) phenotype, whereas in intraocular inflammation (uveitis) this regulation fails, permitting full DC maturation leading to the production and recruitment of pathogenic effector T cells to the eye. Using an in vitro model of DC function, I observed that non-inflammatory aqueous humour (AqH) inhibited DC maturation, with reduced MHC and CD86 expression, and reduced capacity to induce proliferation of allogeneic T cells, an effect which was cortisol and TGFβ2 dependent. In contrast, exposure to uveitis AqH generated a distinct DC profile with IFNγ dependent elevation of MHC class I, but reduced MHC class II and CD86 expression and impaired induction of T cell proliferation. Exposure to uveitis AqH from patients on topical glucocorticoid treatment caused additional suppression of CD86. Characterisation of ex vivo myeloid DC from patients with uveitis supported the findings of the in vitro model, with AqH-derived myeloid DC showing elevated MHC, but reduced CD86 expression. In summary human AqH is shown to be a powerful inhibitor of DC maturation, retaining this regulatory role during uveitis.
Subjects/Keywords: RE Ophthalmology
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MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Denniston, A. K. O. (2010). Regulation of Dendritic cell function by the ocular microenvironment. (Thesis). University of Birmingham. Retrieved from http://etheses.bham.ac.uk//id/eprint/932/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Denniston, Alastair K O. “Regulation of Dendritic cell function by the ocular microenvironment.” 2010. Thesis, University of Birmingham. Accessed December 06, 2019.
http://etheses.bham.ac.uk//id/eprint/932/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Denniston, Alastair K O. “Regulation of Dendritic cell function by the ocular microenvironment.” 2010. Web. 06 Dec 2019.
Vancouver:
Denniston AKO. Regulation of Dendritic cell function by the ocular microenvironment. [Internet] [Thesis]. University of Birmingham; 2010. [cited 2019 Dec 06].
Available from: http://etheses.bham.ac.uk//id/eprint/932/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Denniston AKO. Regulation of Dendritic cell function by the ocular microenvironment. [Thesis]. University of Birmingham; 2010. Available from: http://etheses.bham.ac.uk//id/eprint/932/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Birmingham
22.
Edmunds, Matthew Ross.
Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy.
Degree: d_ph, College of Medical & Dental Sciences, 2016, University of Birmingham
URL: http://etheses.bham.ac.uk//id/eprint/6065/
► Thyroid-Associated Ophthalmopathy (TAO) is a debilitating inflammatory condition of the orbit occurring in 30-50% of Graves' Disease (GD) patients. It is not currently possible to…
(more)
▼ Thyroid-Associated Ophthalmopathy (TAO) is a debilitating inflammatory condition of the orbit occurring in 30-50% of Graves' Disease (GD) patients. It is not currently possible to predict which GD patients will develop TAO or the severity of their eventual ophthalmic manifestations. The aim of this thesis was to evaluate novel biomarkers for this purpose.
I developed two immunoassays to detect serum antibodies to insulin-like growth factor-1 receptor (IGF-lR-Ab) in GD, TAO and healthy controls (HC). Assays were validated to measure commercial monoclonal IGF-lR-Ab but no study group differences, or correlation with clinical activity or severity, were noted with sera.
Differential IGF-lR expression on peripheral blood CD4+ and CDS+ T lymphocyte memory subsets was observed, although without variance between groups. However, T cell differentiation was perturbed, with elevated proportions of naïve, and reduced cytokine-producing effector memory T cells, in GD and TAO compared to HC.
Nuclear magnetic resonance-based serum metabolomic analysis differentiated GD and TAO subjects, and varying TAO clinical activity, with good uncorrected sensitivity and specificity. Distinguishing metabolites included lactate, isopropanol, methylguanidine and pyruvate.
Collectively these data cast doubt on a simple model of IGF-lR-Ab being responsible for orbital inflammation in GD, but highlight the biomarker potential of metabolomics in TAO.
Subjects/Keywords: RE Ophthalmology
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Edmunds, M. R. (2016). Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy. (Thesis). University of Birmingham. Retrieved from http://etheses.bham.ac.uk//id/eprint/6065/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Edmunds, Matthew Ross. “Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy.” 2016. Thesis, University of Birmingham. Accessed December 06, 2019.
http://etheses.bham.ac.uk//id/eprint/6065/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Edmunds, Matthew Ross. “Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy.” 2016. Web. 06 Dec 2019.
Vancouver:
Edmunds MR. Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy. [Internet] [Thesis]. University of Birmingham; 2016. [cited 2019 Dec 06].
Available from: http://etheses.bham.ac.uk//id/eprint/6065/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Edmunds MR. Investigation of candidate biomarkers in Graves' disease and thyroid-associated ophthalmopathy. [Thesis]. University of Birmingham; 2016. Available from: http://etheses.bham.ac.uk//id/eprint/6065/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Birmingham
23.
Barry, Robert John.
Investigating the immunoregulatory role of betaglycan.
Degree: d_ph, College of Medical & Dental Sciences, 2016, University of Birmingham
URL: http://etheses.bham.ac.uk//id/eprint/6432/
► Betaglycan, also known as TGFβRIII, is a component of the TGFβ receptor, being thought to act as a co-factor in signal transduction. It has proven…
(more)
▼ Betaglycan, also known as TGFβRIII, is a component of the TGFβ receptor, being thought to act as a co-factor in signal transduction. It has proven roles in TGFβ-mediated embryogenesis and carcinogenesis, and facilitates signalling by activins and inhibins within the endocrine system. Despite the recognised importance of TGFβ in immunity, little is known about betaglycan in immune regulation.
In mice, absolute deficiency of any of the three isoforms of TGFβ, or any of the individual TGFβ receptor components results in embryonic or perinatal lethality, limiting the ability to study peripheral immune responses in these models. We developed a chimeric model in which betaglycan-deficient stem cells were transferred to immunodeficient hosts, allowing study of mature animals with betaglycan deletion restricted to T and B lymphocytes. We were thus able to investigate peripheral immune responses in vivo, and assess TGFβ signalling to T lymphocytes in vitro, in the presence and absence of betaglycan.
Betaglycan deficiency resulted in upregulated CD4+ and CD8+ T lymphocyte activation, with increased Th1 polarisation in peripheral lymphocyte compartments in both naïve and antigen-experienced animals. These observations confirm the involvement of betaglycan in T lymphocyte biology, providing the first evidence for its role in regulation of peripheral immune responses.
Subjects/Keywords: RE Ophthalmology
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APA ·
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MLA ·
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Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Barry, R. J. (2016). Investigating the immunoregulatory role of betaglycan. (Thesis). University of Birmingham. Retrieved from http://etheses.bham.ac.uk//id/eprint/6432/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Barry, Robert John. “Investigating the immunoregulatory role of betaglycan.” 2016. Thesis, University of Birmingham. Accessed December 06, 2019.
http://etheses.bham.ac.uk//id/eprint/6432/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Barry, Robert John. “Investigating the immunoregulatory role of betaglycan.” 2016. Web. 06 Dec 2019.
Vancouver:
Barry RJ. Investigating the immunoregulatory role of betaglycan. [Internet] [Thesis]. University of Birmingham; 2016. [cited 2019 Dec 06].
Available from: http://etheses.bham.ac.uk//id/eprint/6432/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Barry RJ. Investigating the immunoregulatory role of betaglycan. [Thesis]. University of Birmingham; 2016. Available from: http://etheses.bham.ac.uk//id/eprint/6432/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cardiff University
24.
Cassels, Nicola.
Quality-of-life and clinical outcomes in age-related macular degeneration.
Degree: PhD, 2017, Cardiff University
URL: http://orca.cf.ac.uk/109189/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738351
► Age-related macular degeneration (AMD) is of increasing concern given the ageing population, and the associated economic and social burdens. Vision-related quality-of-life (QoL) is arguably one…
(more)
▼ Age-related macular degeneration (AMD) is of increasing concern given the ageing population, and the associated economic and social burdens. Vision-related quality-of-life (QoL) is arguably one of the most important factors in the management of those with AMD. Consequently, there is a clear need for an understanding of the clinical outcomes that influence vision-related QoL in order to inform management strategies. The principle aim of the studies described herein was to determine the factors that predict vision-related QoL in those with AMD, over 1 year. Experimental procedures were undertaken at baseline (n=52 individuals with AMD) and repeated after 1 year (n=32 individuals with AMD). These included: visual acuity, contrast sensitivity, reading speed, microperimetry, optical coherence tomography and fundus photography. A questionnaire interview included assessment of vision-related QoL (Impact of Visual Impairment questionnaire), health status (EQ-5D), level of depressive symptoms (PHQ-9) and well-being (Warwick-Edinburgh Well-Being Scale). At baseline, the optimum multiple regression model accounted for 41% of the variance in vision-related QoL and included Mean Total Deviation or Mean Sensitivity with level of depressive symptoms. After 1 year, the optimum model to predict change in vision-related QoL accounted for 43% of the variance and included baseline contrast sensitivity and change in health status and reading speed. The most clinically useful measures of visual function, in identifying those with a reduced QoL or those at risk of a reduced QoL were contrast sensitivity, microperimetry, and reading speed. These outcomes may allow a better understanding of vision-related QoL if they were adopted in a clinical setting. In conclusion, the studies provide sufficient evidence to encourage a review of the clinical outcome measures most relevant to vision-related QoL.
Subjects/Keywords: RE Ophthalmology
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APA (6th Edition):
Cassels, N. (2017). Quality-of-life and clinical outcomes in age-related macular degeneration. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/109189/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738351
Chicago Manual of Style (16th Edition):
Cassels, Nicola. “Quality-of-life and clinical outcomes in age-related macular degeneration.” 2017. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/109189/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738351.
MLA Handbook (7th Edition):
Cassels, Nicola. “Quality-of-life and clinical outcomes in age-related macular degeneration.” 2017. Web. 06 Dec 2019.
Vancouver:
Cassels N. Quality-of-life and clinical outcomes in age-related macular degeneration. [Internet] [Doctoral dissertation]. Cardiff University; 2017. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/109189/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738351.
Council of Science Editors:
Cassels N. Quality-of-life and clinical outcomes in age-related macular degeneration. [Doctoral Dissertation]. Cardiff University; 2017. Available from: http://orca.cf.ac.uk/109189/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.738351

University of Glasgow
25.
McMenamin, Paul G.
The biology of immune cells in the eye: Implications for development, health and disease.
Degree: 2009, University of Glasgow
URL: http://theses.gla.ac.uk/3187/
► The work presented in this thesis is a collection of papers from research spanning over 25 years. The research commenced whilst the candidate was employed…
(more)
▼ The work presented in this thesis is a collection of papers from research spanning
over 25 years. The research commenced whilst the candidate was employed in the
Tennent Institute of Ophthalmology and later the Department of Anatomy at the
University of Glasgow and continued in the School of Anatomy & Human Biology,
The University of Western Australia. The research focuses on the biology of
immune cells, primarily dendritic cells (DC), macrophages and mast cells, in the
context of various components of the eye, including the aqueous outflow pathways,
iris, cornea, ciliary body, choroid and retina, and the supporting tissues (lids and
conjunctiva). The studies are broad in the sense that they deal with the role of these
cells in development (such as removing the vascular networks around the
developing lens), their normal homeostasis and function (distribution, phenotype,
turnover and functional activity) and their role in models of a number of eye
diseases. The findings are important in understanding the pathogenesis of diseases
including bacterial keratitis, anterior uveitis, autoimmune uveoretinitis (endogenous posterior uveitis), toxoplasmic retinochoroiditis, age-related macular degeneration
and ocular allergic responses, namely any ocular disease with an immune-mediated
pathology. Many of the findings in the enclosed papers were firsts in the field and
have shaped our understanding of ocular inflammatory disease. In part the success
of some these studies was due to the novel method of performing immunostaining
on tissue wholemounts dissected from small rodent eyes. These preparations
provided unique ‘plan’ views of the complex networks of DCs and macrophages in
the iris and choroid which previously had not been appreciated. In addition, the
wholemount approach used in the characterisation and study of immune cells in
delicate eye tissues, were applied to related studies of the meninges and choroid
plexus of the brain. These studies were amongst the first to fully characterise
distinct DC and macrophage networks in the pia, arachnoid, dura and choroid
plexus. The research presented in the more recent publications have utilised a range
of transgenic, knock-out, congenic and chimeric mouse models to elucidate the
function of immune cells in the eye.
Subjects/Keywords: RE Ophthalmology
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MLA ·
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APA (6th Edition):
McMenamin, P. G. (2009). The biology of immune cells in the eye: Implications for development, health and disease. (Thesis). University of Glasgow. Retrieved from http://theses.gla.ac.uk/3187/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
McMenamin, Paul G. “The biology of immune cells in the eye: Implications for development, health and disease.” 2009. Thesis, University of Glasgow. Accessed December 06, 2019.
http://theses.gla.ac.uk/3187/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
McMenamin, Paul G. “The biology of immune cells in the eye: Implications for development, health and disease.” 2009. Web. 06 Dec 2019.
Vancouver:
McMenamin PG. The biology of immune cells in the eye: Implications for development, health and disease. [Internet] [Thesis]. University of Glasgow; 2009. [cited 2019 Dec 06].
Available from: http://theses.gla.ac.uk/3187/.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
McMenamin PG. The biology of immune cells in the eye: Implications for development, health and disease. [Thesis]. University of Glasgow; 2009. Available from: http://theses.gla.ac.uk/3187/
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Warwick
26.
Al-Athamneh, Nidal.
Communicating risk information about diabetic retinopathy to people with type 2 diabetes.
Degree: PhD, 2018, University of Warwick
URL: http://wrap.warwick.ac.uk/103283/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752492
► A two-stage qualitative research strategy using semi-structured interviews was conducted with a convenience sample of 45 participants who lives with type 2 diabetes. In Stage…
(more)
▼ A two-stage qualitative research strategy using semi-structured interviews was conducted with a convenience sample of 45 participants who lives with type 2 diabetes. In Stage One of the research, a qualitative study was conducted using semi-structured interviews with a purposive sample of 25 participants. Of these, 20 participants were diagnosed with type 2 diabetes, two participants were primary care physicians, two were ophthalmologists, and one was a retinal screener. People with diabetes were purposely recruited to fall into four groups with different grades of diabetic retinopathy. The aim of Stage One was to explore how people with type 2 diabetes perceive diabetic retinopathy risk, their understanding of risk information, and to appraise existing risk communication tools that have been used in other clinical settings. The data from Stage One was analysed and used to develop a risk communication tool designed to provide risk information about diabetic retinopathy and diabetic screening results to people with type 2 diabetes, which was then used in Stage Two. In Stage Two of this research, a total of twenty people with type 2 diabetes were recruited. Participants were divided into two groups based on their grade of diabetic retinopathy. Group one: 10 participants with no diabetic retinopathy (R0); Group two: 10 participants who had background diabetic retinopathy (R1). The aim of Stage Two was to i) appraise a newly developed risk communication tool that was developed to communicate risk information about diabetic retinopathy to people with type 2 diabetes, ii) to explore the influence of the new developed risk tool on risk perception and on diabetes self-care management, and iii) to establish a method(s) by which risk information about diabetic retinopathy can be effectively communicated to people with type 2 diabetes. All interviews were audio recorded and transcribed using a digital recording machine. Data was analysed using constructivist grounded theory approach.
Subjects/Keywords: RE Ophthalmology
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Al-Athamneh, N. (2018). Communicating risk information about diabetic retinopathy to people with type 2 diabetes. (Doctoral Dissertation). University of Warwick. Retrieved from http://wrap.warwick.ac.uk/103283/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752492
Chicago Manual of Style (16th Edition):
Al-Athamneh, Nidal. “Communicating risk information about diabetic retinopathy to people with type 2 diabetes.” 2018. Doctoral Dissertation, University of Warwick. Accessed December 06, 2019.
http://wrap.warwick.ac.uk/103283/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752492.
MLA Handbook (7th Edition):
Al-Athamneh, Nidal. “Communicating risk information about diabetic retinopathy to people with type 2 diabetes.” 2018. Web. 06 Dec 2019.
Vancouver:
Al-Athamneh N. Communicating risk information about diabetic retinopathy to people with type 2 diabetes. [Internet] [Doctoral dissertation]. University of Warwick; 2018. [cited 2019 Dec 06].
Available from: http://wrap.warwick.ac.uk/103283/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752492.
Council of Science Editors:
Al-Athamneh N. Communicating risk information about diabetic retinopathy to people with type 2 diabetes. [Doctoral Dissertation]. University of Warwick; 2018. Available from: http://wrap.warwick.ac.uk/103283/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.752492

Cardiff University
27.
Aldahlawi, Nada.
Investigations into the potential effectiveness of new and existing corneal cross-linking therapies.
Degree: PhD, 2018, Cardiff University
URL: http://orca.cf.ac.uk/112180/
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.753547
► The studies comprising this thesis were conducted to examine the potential of a range of cross-linking therapies; in particular, to investigate the effect of a…
(more)
▼ The studies comprising this thesis were conducted to examine the potential of a range of cross-linking therapies; in particular, to investigate the effect of a novel cross-linking therapy (involving a bacteriochlorophyll derivative and near-infra red illumination (WST-D/NIR)) on the structure of the cornea, and to develop a trans-epithelial riboflavin/Ultraviolet-A (UVA) corneal cross-linking protocol that was equally effective to that of the standard protocol (SCXL), without the need for epithelium removal. A number of laboratory techniques were used to investigate changes in the structure of the cornea and its biochemical and biomechanical properties following cross-linking. X-ray scattering and electron microscopy data provided evidence that treatment with WST-D/NIR resulted in no change in corneal collagen organisation and confirmed its potential as an alternative to riboflavin/UVA cross-linking for stiffening diseased or surgically weakened corneas. Enzyme digestion studies and strip extensometry were performed to compare the effectiveness of newly developed riboflavin/UVA protocols to that of the SCXL protocol in terms of their ability to increase the enzymatic resistance and stiffness of the cornea. The studies indicated that the intensity and distribution of cross-links formed within the cornea vary with different protocols, and that the outcome of trans-epithelial riboflavin/UVA cross-linking may be significantly enhanced through the use of higher concentrations of riboflavin, a longer duration of iontophoresis and the use of pulsed and higher energy dose UVA. Although the precise amount of CXL required to prevent the disease progression is still unidentified, the full stromal depth of CXL post SCXL treatment might not be needed, therefore, modified trans-epithelial protocols identified in this thesis may be sufficient to prevent disease progression. Further clinical studies, especially randomized prospective trials, are, however, required to confirm the encouraging results of these modified procedures.
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Aldahlawi, N. (2018). Investigations into the potential effectiveness of new and existing corneal cross-linking therapies. (Doctoral Dissertation). Cardiff University. Retrieved from http://orca.cf.ac.uk/112180/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.753547
Chicago Manual of Style (16th Edition):
Aldahlawi, Nada. “Investigations into the potential effectiveness of new and existing corneal cross-linking therapies.” 2018. Doctoral Dissertation, Cardiff University. Accessed December 06, 2019.
http://orca.cf.ac.uk/112180/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.753547.
MLA Handbook (7th Edition):
Aldahlawi, Nada. “Investigations into the potential effectiveness of new and existing corneal cross-linking therapies.” 2018. Web. 06 Dec 2019.
Vancouver:
Aldahlawi N. Investigations into the potential effectiveness of new and existing corneal cross-linking therapies. [Internet] [Doctoral dissertation]. Cardiff University; 2018. [cited 2019 Dec 06].
Available from: http://orca.cf.ac.uk/112180/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.753547.
Council of Science Editors:
Aldahlawi N. Investigations into the potential effectiveness of new and existing corneal cross-linking therapies. [Doctoral Dissertation]. Cardiff University; 2018. Available from: http://orca.cf.ac.uk/112180/ ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.753547
28.
Hristova, Elitsa.
Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение.
Degree: phd, Department of Physiotherapy, Rehabilitation, Thalassotherapy and Occupational Diseases, 2016, Medical University of Varna
URL: http://eprints.mu-varna.bg/235/
► [EN] The main purpose of this study is to perform an assessment of the microstructural macular changes in patients with social retinal diseases. To compare…
(more)
▼ [EN]
The main purpose of this study is to perform an assessment of the microstructural macular changes in patients with social retinal diseases. To compare the diagnostic means of optical coherence tomography (OCT) and fluorescein angiography (FA) in this patients.
The study included 417 eyes of 293 subjects who were divided into two large groups. Group I included 200 healthy eyes of 102 subjects, mean age 44,7±18,5 years (16-82 years); 54 women, 48 men, without systemic or ocular disease, untreated surgically and/or medically, BCVA ? 1.0. All patients in this group were examined by 3D OCT-2000Topcon. The group with pathological retinal changes was divided into following subgroups: group II А – 60 eyes of 50 subjects with dry age-related macular degeneration (AMD); group II B - 55 eyes of 50 subjects with wet AMD; group III – 51 eyes of 50 subjects with retinal vein occlusion (RVO) (42 eyes with branch RVO and 9 eyes with central RVO); group IV – 51 eyes of 41 subjects with central serous chorioretinopathy (CSC).
Microstructural images of all subjects were obtained using OCT. With the assistance of optical coherence tomography was measured also macular thickness and volume. The group with pathological retinal changes was examined also with fluorescein angiography (FA). The results these two methods of examination were analyzed qualitatively and quantitatively.
There was negative statistically significant correlation between macular retinal thickness and volume in healthy subjects group and age. There was no statistically significant correlation between these parameters and gender. The macular thickness was maximal at age between 30 and 50 years and decrease with age. Macular thickness decreasing was with 0.150 µm per year.
There were statistically significant lower macular thickness in inner 3mm ETDRS ring, mean retinal thickness, central point thickness and volume in patients with dry AMD compared to healthy subjects. Statistically significant higher macular thickness in fovea and central point thickness has group with wet AMD compared to healthy subjects. There was statistically significant difference between dry and wet AMD group for fovea, nasal parafoveally and perifoveal zones, central point thickness and volume.
There was statistically significant higher macular thickness for all ETDRS zones in patients with BRVO compared to healthy subjects. Similar were results for patients with CRVO compared to healthy subjects except central point thickness. There was statistically significant difference between BRVO and CRVO group but only for inferior parafoveal zone.
There were statistically significant higher macular thickness, central point thickness and volume and all ETDRS zones, except inferior and temporal parafoveal zones in patients with CSC compared to group I.
There was moderate statistically significant negative correlation between visual acuity in group with dry AMD and OCT changes in IS/OS junction and ELM.
The presence of intraretinal cysts in inner retinal layers affects visual acuity in…
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hristova, E. (2016). Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение. (Doctoral Dissertation). Medical University of Varna. Retrieved from http://eprints.mu-varna.bg/235/
Chicago Manual of Style (16th Edition):
Hristova, Elitsa. “Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение.” 2016. Doctoral Dissertation, Medical University of Varna. Accessed December 06, 2019.
http://eprints.mu-varna.bg/235/.
MLA Handbook (7th Edition):
Hristova, Elitsa. “Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение.” 2016. Web. 06 Dec 2019.
Vancouver:
Hristova E. Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение. [Internet] [Doctoral dissertation]. Medical University of Varna; 2016. [cited 2019 Dec 06].
Available from: http://eprints.mu-varna.bg/235/.
Council of Science Editors:
Hristova E. Microstructural Macular Changes in Patients with Socially Significant Retinal Diseases /// Микроструктурни характеристики на промените в макулата при заболявания на ретината със социално значение. [Doctoral Dissertation]. Medical University of Varna; 2016. Available from: http://eprints.mu-varna.bg/235/
29.
Toshev, Ruslan.
Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво.
Degree: phd, Department of Ophthalmology and Visual Sciences, 2014, Medical University of Varna
URL: http://eprints.mu-varna.bg/259/
► [EN] This study aims to explore optimal algorithm options for screening patients with glaucoma on a regional and national level. The possibilities for measuring intraocular…
(more)
▼ [EN]
This study aims to explore optimal algorithm options for screening patients with glaucoma on a regional and national level. The possibilities for measuring intraocular pressure and assessment of the optic disc were researched and analysed, including routine mass methods which do not require highly specialized equipment. The experimental part of the study involved attempts to correlate corneal microstructural changes in different types of glaucoma and in the course of disease progression. Last but not least, changes in the quality of life of patients suffering from glaucoma were analysed based on a standardized questionnaire.
Objective: The main objective of this study was to implement and analyse various screening methods for early detection of glaucoma, both in clinical and experimental conditions, and to develop algorithms applicable for everyday clinical practice. Eight tasks were designated in view of achieving the above objective.
Results: To determine accuracy and precision in measurement of the intraocular pressure and its correction based on corneal thickness, 900 measurements were made by two examiners. The average value of the pressure with Tonopachy was 14.69 ± 2.1 mm / Hg, and the corrected value was higher-15.14 ± 2.64 mm / Hg. Values obtained using a Goldmann tonometer were 13.44 ± 4.42 mm / Hg and 14.1 ± 4.21 mm / Hg respectively. Patients’ evaluation raised a total score of 4.27 for Goldmann tonometer combined with ultrasonic pachimetry (regardless the topical anaesthesia), and 3.2 for the examination with air jet tonopahymetre (Tonopachy).
The optic nerve evaluation was based on clinical photography, subjectively graded by two examiners, and included a total of 800 values. Subsequently, horizontal and vertical meridian were accurately measured. In clinical / visual assessment of the disc, repeatability of 53% between the two examiners was achieved. Of the remaining 43% there was a deviation of 0.1 in 28% of cases and 0.2 or more in 15% of cases, mostly in the vertical meridian. The results of the two examiners were much closer when measurement was performed, again in 17% of cases there was a disparity of 0.1, mostly on vertical meridian measurement.
In eyes with primary open-angle glaucoma - Group 1 (n = 56), and eyes with pseudoexfoliative glaucoma -group 2 (n = 56) with anterior segment optical coherence tomography, central corneal thickness was measured at 531 ± 91 μm (group 1) and 595 ± 28 μm (group 2). Pseudoexfoliations at the posterior surface were clearly visualised.
Assessment of the corneal microstructure was done with the aid of confocal microscopy of 30 patients (58 eyes) with no ocular pathology (control), 26 patients (52 eyes) with open-angle glaucoma, 20 patients (33 eyes) with pseudoexfoliation glaucoma and in both eyes of 16 patients with an acute angle closure glaucoma (first clinical presentation). Quantitative measurement of cell numbers in the normal epithelium, anterior and posterior stroma and endothelium were respectively 55555 ± 194 cells / mm ², 342 ± 21 cells /…
Subjects/Keywords: RE Ophthalmology
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Toshev, R. (2014). Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво. (Doctoral Dissertation). Medical University of Varna. Retrieved from http://eprints.mu-varna.bg/259/
Chicago Manual of Style (16th Edition):
Toshev, Ruslan. “Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво.” 2014. Doctoral Dissertation, Medical University of Varna. Accessed December 06, 2019.
http://eprints.mu-varna.bg/259/.
MLA Handbook (7th Edition):
Toshev, Ruslan. “Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво.” 2014. Web. 06 Dec 2019.
Vancouver:
Toshev R. Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво. [Internet] [Doctoral dissertation]. Medical University of Varna; 2014. [cited 2019 Dec 06].
Available from: http://eprints.mu-varna.bg/259/.
Council of Science Editors:
Toshev R. Significance of Glaucoma Worldwide and in Bulgaria, Screening Possibilities, Early Detection and Analysis of Microstructural Changes /// Глаукомата – значим проблем в България и света, възможности за скрининг, ранно откриване и анализ на промените на микростуктурно ниво. [Doctoral Dissertation]. Medical University of Varna; 2014. Available from: http://eprints.mu-varna.bg/259/
30.
Peeva, Svilena.
Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания.
Degree: phd, Department of Ophthalmology and Visual Sciences, 2017, Medical University of Varna
URL: http://eprints.mu-varna.bg/335/http://eprints.mu-varna.bg/335/2/ENGLISH%20Extended%20Abstract%20of%20a%20PhD%20thesis.docx
► [EN] The main purpose of this study is to perform an assessment of the living human cornea in healthy subjects by high-tech methods for tomographic…
(more)
▼ [EN]
The main purpose of this study is to perform an assessment of the living human cornea in healthy subjects by high-tech methods for tomographic and microstructural analysis of healthy cornea and based on this to evaluate pathological changes of the subjects with diabetes with different stages of diabetic retinopathy. In vivo confocal microscopy was used to estimate corneal thickness applying the first image of the endothelium as a standard based on which to evaluate corneal thickness in different age groups and pathological changes of the subjects with diabetes with different stages of diabetic retinopathy.
Methods: The major advantage of laser scanning confocal microscope (Heidelberg Retina Tomography II Rostock Corneal Module (HRTII) (Heidelberg, Germany) is the ability to image thin layers (to 10 ?m) of the cornea. To create standards for in vivo confocal microscopy performed with HRT II corneal module and describe characteristics of normal, healthy, human cornea this prospective study included 60 subjects with total of 120 eyes without eye pathology. The inclusion criteria were: no history of eye disease, no contact lens use, no slit-lamp visible corneal pathology, no systemic disease such as diabetes, no current medical treatment and no any surgical eye treatment. The mean age of the patients was 52± 2,9 years (33 women and 27 men).
Group I included 52 healthy eyes of 26 subjects, aged 20-26 years; 13 women, 13 men.
Group II included 48 healthy eyes of 24 subjects, aged 26-47 years; 54% women and 46% men. Patients were randomly selected by screening and mandatory purpose is subjects have to be healthy without subjective or objective evidence of diseases.
Group III included only 20 healthy eyes of 10 subjects aged 50-65 years; 5 women and 5 men.
To assess the cornea in subjects with diabetes the study subjects were divided into three groups. The first group are 60 patients without clinical or laboratory evidence of diabetes (33 women and 27 men with a mean age 52±2,9years, aged 22-70 years). The second group of patients with diabetes more than 5 years but without clinical evidence of diabetic retinopathy and neuropathy- 25 subjects (13 women and 12 men with an average age 43.4 ± 2.1, aged 22-65 years).
The third group - diabetic patients with diabetic retinopathy, 25 subjects (10 women, 15 men; with an average age 57.9 ± 2.6 years, aged 32-70 years).
Results: Analysis reveals that with age progression the number of cells progressively decreases. The average corneal thickness was 0.532±11?m. There is no statistically significant difference between different groups. The average corneal thickness in female subjects is 0.536 ?m which is with 0.004?m more than the male corneal thickness.
Conclusion: The current study established corneal changes in different ages and in subjects with diabetes. This approach assessed qualitative changes in cornea which could be used as an analysis of moment status of the cornea. Calculated cell densities of different corneal layers could be used for comparative analysis…
Subjects/Keywords: RE Ophthalmology
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Manager
APA (6th Edition):
Peeva, S. (2017). Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания. (Doctoral Dissertation). Medical University of Varna. Retrieved from http://eprints.mu-varna.bg/335/http://eprints.mu-varna.bg/335/2/ENGLISH%20Extended%20Abstract%20of%20a%20PhD%20thesis.docx
Chicago Manual of Style (16th Edition):
Peeva, Svilena. “Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания.” 2017. Doctoral Dissertation, Medical University of Varna. Accessed December 06, 2019.
http://eprints.mu-varna.bg/335/http://eprints.mu-varna.bg/335/2/ENGLISH%20Extended%20Abstract%20of%20a%20PhD%20thesis.docx.
MLA Handbook (7th Edition):
Peeva, Svilena. “Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания.” 2017. Web. 06 Dec 2019.
Vancouver:
Peeva S. Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания. [Internet] [Doctoral dissertation]. Medical University of Varna; 2017. [cited 2019 Dec 06].
Available from: http://eprints.mu-varna.bg/335/http://eprints.mu-varna.bg/335/2/ENGLISH%20Extended%20Abstract%20of%20a%20PhD%20thesis.docx.
Council of Science Editors:
Peeva S. Morphometric Microstructural Analysis of Cornea within the Norm in and in Somatic and Genetic Diseases //// Морфометричен микроструктурен анализ на роговицата в норма и при соматични и генетични заболявания. [Doctoral Dissertation]. Medical University of Varna; 2017. Available from: http://eprints.mu-varna.bg/335/http://eprints.mu-varna.bg/335/2/ENGLISH%20Extended%20Abstract%20of%20a%20PhD%20thesis.docx
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